Sewing machine



FIG. 1. is a front view of a sewing machine showing our new design.

FIG. 2. is a back view thereof.

FIG. 3. is a top view thereof.

FIG. 4. is a bottom view thereof.

FIG. 5. is a right side view thereof.

FIG. 6. is a left side view thereof; and,

FIG. 7. is a perspective view thereof. 

The ornamental design for a sewing machine, as shown and described. 